Hitachi, Ltd.

Hitachi Software Engineering Company, Ltd.

Hitachi Electronics Services Co. Ltd.

Hitachi Computer Engineering Co., Ltd.

Atsushi Ueoka

Toshio Hirosawa

Motohide Kokunishi

Tadashi Yamagishi

Tsutomu Ito

Takeshi Ishizaki

Shigeru Sasaki

Kazuyuki Nakamura

Fujio Fujita

Masahiko Ishimaru

Yoshikazu Ichikawa

Kaoru Kozuma

Hideki Namba

Michio Hirano

Masayuki Yamamoto

Yasunori Kaneda

Takashi Matsumoto

Kiminori Sugauchi

Jun Mizuno

Toshio Otani

Emiko Kobayashi

Hiroshi Wada

Toui Miyawaki

Yoshio Ukai

Seiji Inoue

Masaaki Iwasaki

Takaki Nakamura

Takashi Nomura

Kenta Shiga

Takehiro Morishige

Yasuo Yamasaki

Minoru Hidaka

Tutomu Itoh

Tsutomu Itoh

Manabu Demoto

Tutomo Itoh

Keiichi Shiobara

Kouichi Nakatsu

Yoji Kawashima

Yutaka Nara

A NAS device providing a snapshot function for executing CoW processing in multiple successive block units is provided, wherein upon restoring a file saved in a file system sharing from a snapshot, the speed for restoring files is enhanced by restoring only data blocks that have been changed within the data blocks constituting a file, to thereby reduce the amount of data being restored and cut down CoW processing. Upon restoring a file stored in file system sharing from a snapshot file, data blocks storing different data between the restore source file and the restore destination file are specified based on a differential map table and a differential block table, and only the specified data blocks are restored. Further, upon restoring data from a file other than the snapshot, the data blocks constituting the restore source file and the restore destination file are compared, and only the data blocks storing different data are restored.

Restoring method and computer system

In a state where the migration source NAS apparatus is continuously operated, a migration processing program confirms the update date and time of files stored in the migration source NAS apparatus, and migrates only the files that were not updated from a specific time to the start date and time of migration processing. Or, the migration processing program migrates the files stored in the migration source NAS apparatus sequentially from the oldest file. The migration performance is calculated based on the capacity and migration time of the migrated files, and the time required for migrating the non-migrated files is calculated based on the size and migration performance of the non-migrated files.

Method, apparatus, program and system for migrating NAS system

Before transferring a file, a CPU executes the following processing based on a transfer processing program: obtaining the directory tree structure of a transfer-source storage device; dividing the directory tree into directory trees so that each divided directory tree is structured within the full path length of a directory tree that can be handled by a transfer-destination storage device; associating the divided directory trees with each other; and then storing the associated directory trees in a volume of the transfer-destination storage device.

Storage system and information transfer method for the same

A computer system to prevent intervention and falsification by setting encrypted transfer between a host computer and a first storage device that provides a virtual volume and between the first storage device and second and third storage devices that provide a real volume corresponding to the virtual volume. A management computer specifies the second and third storage device that provide the real volume corresponding to the virtual volume by providing a volume corresponding to the virtual volume used by a host computer in which encrypted transfer becomes necessary, and setting the encrypted transfer to communication between the first storage device and the second and third storage devices, makes a reconnection thereof, and also sets the encrypted transfer to an I/O port used for the communication with the host computer in the first storage device.

Computer system, management computer, and volume allocation change method of management computer

To ensure the consistency of data included in blocks which have already been received and has already been remote-copied, on a file basis, in a destination NAS system, when remote copy has failed due to a failure which has occurred in a source NAS system, there is provided a method in which: a source NAS system transmits a correspondence between an updated block and a file, to a destination NAS system when remote copy is started; the destination NAS system records a remote copy state for each block; a management server refers to the information recorded by the destination NAS system and selects files from which all the update blocks have been received, when remote copy has failed due to a failure which has occurred in the source NAS system; and the destination NAS system stores data included in the update blocks of the files selected by the management server.

Data recovery method in differential remote backup for a NAS system

Either a controller in a storage system, or a management computer monitors a bandwidth used in each I/O port in the storage system, and a bandwidth used by each host computer connected to each I/O port, and redirects a host computer using a bandwidth close to a difference in bandwidth used in the I/O ports, from the I/O port where a maximum bandwidth is used to the I/O port where a minimum bandwidth is used.

Computer system and dynamic port allocation method

In a system which manages path information and status of network with respect to a path being used for access to a storage apparatus and has a redundant path, when a fault occurs in the network, whether or not the path can be recovered by rerouting in network apparatuses is discriminated, thereby performing proper path switching. Construction information and the path information of the network are managed as information of the path which is being used for a storage access by a management server. Further, when the access path is made redundant, the management server obtains fault information in the network and information showing whether or not the path is being reconstructed from the network apparatuses, thereby discriminating the necessity of the path switching. If the path switching is necessary, the management server notifies a host computer and the storage apparatus of it and each apparatus executes a switching process.

Storage network management server, storage network managing method, storage network managing program, and storage network management system

The present invention decreases the burden of operation required for specifying the continuity status and the cause of failure of a network storage device. A host computer accepts the specification of the device identifier, that is an identifier of the network storage device in the host protocol which positions in a higher hierarchy than the network communication protocol, and a volume identifier, that is an identifier of the volume. Then based on the specified device identifier, the host computer specifies the network identifier, that is an identifier of the network storage device in the network communication protocol. And continuity is confirmed in the network communication protocol in which the specified network identifier is the destination. Also continuity is confirmed in the host protocol in which the device identifier is the destination. And the volume specified by the volume identifier is accessed.

Connectivity confirmation method for network storage device and host computer

A controller connected to computers analyzes messages from the computers and converts the analyzed messages into a different format. The controller also generates correspondence information for the message.

System management information processing method for use with a plurality of operating systems having different message formats

To generate a command for dealing with error message from accumulated information and transmit the command to information processing as transmission place, a process analyzes error message received by a communication process, searches file based on analysis of the error message, and searches file based on search, to acquire related message. A process analyzes the error message and the related message, and searches file in which contents of recovery operation generated in process have been accumulated, for information whose recover operation condition is in agreement with the analyzed information. A process displays the contents of searched information on display. A process generates command based on recovery operation corresponding to recovery operation method selected by a keyboard or a mouse, and on the error message and the related message by process. The communication process transmits the generated command to information processor unit.

Method for system obstacle correspondence support

A messaging processing system which includes a process control table for storing the control information of a process corresponding to access terminals connected through a public network in a form that identifiers indicating the 'priority processing' are added to the control information, and a scheduler that executes the process having the identifier indicating the 'priority processing' in preference to the other processes during the dispatching processing of the process.

Messaging processing system and method

In response to a variety of commands entered via a terminal unit, a configuration-management aiding apparatus directly connected to a computer system carries out various kinds of work such as laying-out of pieces of equipment, inspection of the layout of the pieces of equipment for an overlap, inspection of amounts of dissipated heat, inspection of amounts of consumed electrical power, inspection of connection of cables, creation of a cabling work specification manual, creation of a logical-configuration drawing and creation of configuration defining parameters. The configuration defining parameters are transferred to a file in the computer system. The terminal unit of the configuration-management aiding apparatus also functions as a console of the computer system.

Method and apparatus for aiding configurating management of a computer

Method and apparatus for aiding configuration management of a computer

Growing community of inventors

Machida, Japan

Atsushi Ueoka